Spring flask compress



July 2, 1935. Y B. A. ROELOFS 2,006,903

SPRING FLASK COMPRESS Filed July 13, 1935 INVENTOR Patented July 2,1935 M 2,0053% a UNITED STATES "PATENT" cance 7 SPRING FLASSK-Q'COMPRESS Bert FA. I{.oelo fs, Kalamazomltlich. Application July 13, ,19ss; ser'ia1 Nb; 680,244

. Claims. (01.18-33) .11

Themainobjects of this invention are:" '1' ,j 4 of the frame 3 directly'under the set screw 1 First, to provide an improved springcomp'ress M which is thereupon turned to engage the lower for dental molds and the like. j endthereof with the top of the block I5,fa screw Second, to providea spring flask compress that driver being used forthispurpose. The nut 9 5 is simple and economical in its partsand effecis'then backed off or unscrewed so that the full '5 tive andeflicient in operation. 7 .7 orcelofih compressing sp i 12 is e s d Objects relating to details andeconomies of and-transmitted through theset screw H to the my invention will appear from the'description to mold ormolds assembled thereunder. After the follow. The invention is defined and pointed'out molding process, the .nut 9 is tightened so as to 10 in the claims. v v i retract the} compression spring l2 and the set 10' A structure which is a preferred embodiment screw 1 4 is unscrewed so as to'release the block of my invention is illustrated in the'accompany' I5 and/or the plate ll, whereupon the dental ing drawing, in which: 7 r flask'ior flasks may be removed from the com} .Fig. 1 is a side elevation of acompressem: press. Ingthe'molding or vulcanizing process, I bodying the invention, a second flask being inthe-"compression springv I2 urges the'flas k sec- 15 dicated by dotted lines. j tions "tightly, but 'resiliently together. ;The -set Fig. 2 is afragmentary side elevation partlyin screw l4 serves the two-fold purpose of (l) holdvertical sectionon line 2-2 of Fig. 3. ing "the flasks" in place prior to"-rejleasing the Fig. 3 is a horizontal section on line 3-3 of spring l-2 and"(ZYtranSmittingthe force-of'the Figs. 1 and 2, a flask being indicated by dotted spring l2 to the flasks in the compress. The 20 lines. spring I2 is preferably designed to have enough Fig. 4 is a fragmentary side elevation partly in tension to properly close one or more flasks. vertical section of a modification. Referring to Fig. 4, there is illustrated a modi- Referring to the drawing, l is a conventional flcation wherein the cross member or support 6 dental mold or flask operatively associated with of the frame is provided with an opening 1 in the compress 2. The compress or clamp consists which is disposed the bolt I!) having a head 20 of a frame 3 comprising a base 4, integral side engaging the .top of the support and a nut or uprights 5 extending therefrom, and an integral lower end member 2|, the latter being provided cross member or support 6 connecting the upper with a radial flange 22 which constitutes a lower endso-f the uprights. The supportfi hasa central end thrust member for the volute compression 30 opening 1 through which is disposed the bolt 8 spring l2 and aforce distributing plate for'engaghaving a nut 9 and. a head [0. The nut engages ing the top flask l6 when a plurality thereof are the top of the support 6, while the head I0 is assembled in the compress. In operation, the provided with a radial flange ll disposed in flasks are assembled in the frame below the spaced relation to the support 6. A volute spring flange 22 and the head 20 is then turned so as 35 I2 of heavy strap steel is disposed around the to release the spring I2 to clamp the flask through head I 0 between the support 6 and the flange the nut 2|. After the vulcanizing process, the H for urging the head It! downwardly away from head 26 is tightened so as to elevate the nut 2|, the support 6. thereby compressing the spring 12 and releasing 40 The bolt 8 has a longitudinal central bore l3 the flasks. In this modification, the parts are 40 in which is threaded the set screw. M for initially few and relatively simple and the individual parts engaging the spacing or filler block I5 disposed are readily removable and replaceable. on the mold l or with the top of the upper mold The frames are preferably adapted to receive where a plurality of molds are used, the upper at least two large flasks, and. when fewer or mold in this case being indicated by 'thedotted smaller flasks are used, the intervening space is 45 lines l6 of Fig. l. A force distributing plate or filled with thespacing block l5 or its equivalent. disk I! is disposed between the block l5 and the I prefer to use a solid metal member for this flask I when the block I5 is used and between purpose. A particularly desirable feature of my the lower end of the set screw l4 and the top of invention resides in the fact that the potential the upper flask l6 when the block is unnecesforce of the compression spring I2 is utilized 50 sary, the position of the force distributing memquickly and conveniently by merely releasing the her in the latter case being indicated by the spring after the flasks have been inserted in the dotted lines I8 of Fig. 1. compress.

In operation, the flask I, force distributing The set screw M of the modification illustrated A plate l1, and block l5 are arranged on the base in Figs. 1 to 3, inclusive, provides means whereby 55 the 11111 force of the compression spring may be applied to the flask or flasks directly and without using the spring to expend its force by filling the intervening space which is taken care of by the set screw l4. Also, the arrangement is such that the force of the spring is expended on the bolt, thereby leaving the set screw free to be turned to release or engage the flasks with a relatively slight manual effort.

I have illustrated and described my improvements in embodiments which I have found very practical. I have not attempted to illustrate or describe other embodiments or adaptations, asjt,

is believed this disclosure will enable those skilled in the art to embody or adapt my improvements as may be desired;

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A compress for dental molds, comprising a frame comprising a base, integral uprights extending therefrom, and an integral horizontal cross member. connecting said uprights, said cross member having a central, opening, a bolt disposed through said opening and having one end member engaging the topthereof and the other end member disposed under said cross member and in spaced relation thereto, said last named end member having a radial flange, and a volute spring disposed around said bolt between said flange and said cross member, and urging these parts away from each other, said bolt having a longitudinal central bore, and a set screw threaded in said bore for engaging the top of the mold,

' 2, A compress or clamp for dental flasks. comprising a frame adapted to receive a flask and having a top piece with an opening therein, a volute coiled spring formed of flat stock disposed below said top piece with its outer coil engaging the same, a spring support member engaging the inner coil of the spring and having a threaded stem disposed through said opening in said top piece, a nut threaded on said stem whereby the spring may be collapsed, and a screw threaded into said support for adjustment independently thereof for initially engaging the top of the flask before the pressure of the spring is released by unscrewing said nut.

3. A compress for dental molds, provided with a support having an opening, a bolt disposed through said opening and having a nut engaging said support, a volute spring disposed around said bolt between said support and the head of said bolt and urging said head away from said support,

the nut limiting the movement of said bolt, said bolt having a longitudinal central bore, and a set screw threaded in said bore for initially engaging the top of'the mold before the pressure of the spring "is released by unscrewing said nut.

4. A compress for dental molds, provided with a support having an opening, I a bolt, disposed through said opening and having an upper end member engaging said support and a lower end member, spaced'therefrom, a volute compression spring disposed around said bolt between said support and said lower end member, said bolt having a longitudinal central bore, and a set screw threaded in said bore for engaging the top of the mold.

5. A compress for dental molds, provided with a support having an opening, a bolt disposed through said'opening and having a nut engaging said support, a compression spring disposed between said support and the head of said bolt, said bolt having a longitudinal central bore, and a set screw threaded in said bore for engaging the top of the mold.

BERT A. ROELOFS. 

